Improvement in compositions for pavements



UNITED" STATE-S;

PATENT OFFICE;

NATHANI'BQABBOVTT, or BROOKLYN, NEW YORK.

v IMPROVEMENT m compositions FOR PAVEMENTS.

Specification forming part of Letters Patent No. 1 [2,764, dated March 21, 1871.

Tod-ll whom it may concern:

-'Be it known that I,NAT1 IAN I3. Anno'r'r, of

Brooklyn, in thecounty otZKings and State of .New, York, have invented. certain new and useful Improvements in Composition Pave .rnents; and the following is hereby declared to be a correct description ot' the same:

This invention relates to that class of com position pavement con'iposed mainly of sand, gravel, ashes, broken stone, &c., mixed with ta-r or other bituminous material to form an ,chtstie and waterproof road or pavement.

I make use of pitch from the redistillation of coal-tar'or asphalt in connection with crude.

creosote, employing about seven parts of the former to one of the latter. To this 1 add sand, gravel, ashes, broken stone, or either of them,- in the desired proportions, and the mass, while hot, is to be stirred to render the mass homogeneous. The pitch should not be as soft as that nsuall y used for rooting, neither is it to beef a brittle nature, but of a tough character, somewhat similar to asphalt. o

The composition is to be applied while hot to the. roadway, and, besides possessing the advantages of an elastic and water-proof road or pavement, said composition makes a piwement that will set vey quickly after being -laid, allowing travel over the same much sooner than the composition paveinen'ts'heretotore in use, and at the same time said pavement will not be affected by heat, in consequence of the absence of light oils contained in the coal-tar, and which are not found in pitch from the redistillation of coal-tar.

The above composition may be slightly varied as follows: 1 itch.from the redistilla-tion ot' coal-tar, about nine parts, and 0t creosote,

one part. To this may be addedabout two parts of coa'l-tar, either crude or distilled.

Sand, gravel, broken stone, ashes, &c., or

either of them, are to be employed with the,

above, and the whole thoroughly mixed while hot, and applied to the road as aforesaid.

This composition makes a pavement similar to the first named, and possesses the same advantages. i

The creosote combined with the pitch makes the composition very toug'h,,and prevents it becoming too hard and brittle, and renders the same sufliciently elastic to prevent its breaking'up, and the creosote becomes a bond of union with the earthy materials by penetrating the i nter'stjces and spreading upon the entire surfaces of the-particles. I

The composition is'especially intended as a surface for street and. road pavements, and may be laid upon a foundation of cobble or other stones, and it is to be rolled and finished at once,

I claim as my invention- The composition formed of coal-tar, pitch, or asphalt, and creosote, with the other ingredients named.

Signed by me this 11th day of October, -1870.

NATHAN B. ABBOTT.

Witnesses:v

HAROLD SERRELL', j GEO. T; PINOKNEY. 

